JPH11291074A - Alignment method for light source for illumination - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an alignment method for a light source for illumination which is capable of rapidly executing positioning of a light emitting source and fixation of an illumination tube without contaminating the inside surface of a reflector. SOLUTION: A cylindrical mouthpiece 7 having a collar part 7a is fixed in a sleeve state to a circular tubular part 12a of an illumination tube 12 and a cylindrical collar 8 provided with a collar part 8a in contact with the collar part 7a is held in a fitting state at the cylindrical part 1b of the reflector 1 by an inorg. tacky adhesive 9. The cylindrical mouthpiece 7 is freely inserted into the cylindrical collar 8. The illumination tube is moved in (x), (y) directions in the state that both collar parts 7a, 8a are held in contact by a positioning means 20. Focus positioning is executed by moving the illumination tube in a (z) direction. In addition, both collar parts 7a, 8a are joined by laser welding. The cylindrical collar 8 is fixed to the cylindrical part 1b of the reflector 1 by heating the inorg. tacky adhesive 9 sideways.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for aligning an illumination light source having a reflector.

[0002]

2. Description of the Related Art A conventional alignment method of an illumination light source of this kind is, for example, as shown in FIG. 4, in which a reflector 1 having a reflective spherical surface 1a is provided with a cylindrical portion 1b, while quartz glass is used. A light emitting source 3 is provided at the center of the formed circular illumination tube 2.

[0003] At a position where the light emitting source 3 matches the focal point of the reflector 1, cement 5 is injected from the front and rear of the reflector 1 with a syringe 4, and the cement 5 is solidified by the heat of the light emitting source 3, and The alignment is performed by fixing the cylindrical portion 1b of the reflector 1 to the circular tube portion 2a.

[0004]

However, in the above-described conventional method for aligning a light source for illumination, it is necessary to wait several tens of minutes or more until the inside of the reflector 1 is stained by the dripping of cement or the cement 5 is hardened. There was a problem that productivity was extremely poor.

It is an object of the present invention to provide a method of aligning an illumination light source, which can align and fix an illumination tube to a cylindrical portion of a reflector in a short time and does not stain an inner surface of the reflector.

[0006]

In order to achieve the above object, a first invention of the present application is to move a lighting tube in a three-dimensional direction of x, y, z by a positioning means, and to set a light emitting source of the lighting tube. In an alignment method of an illumination light source positioned at a focal position of a reflector having a reflective spherical surface, x, which is perpendicular to the z direction, is attached to a circular tube portion of an illumination tube having an axis in the z direction.
A cylindrical base having a flange in the y-plane on the outer end side is firmly fixed in a fitted state, has an inner diameter larger than the outer diameter of the cylindrical base, and has an x, y plane on the flange of the cylindrical base. The cylindrical collar provided on the outer end side with a flange portion that comes in contact with the cylindrical portion having an axial center in the z direction of the reflector is held in a fitted state via an inorganic adhesive, and the cylindrical die is attached to the cylindrical base. The illumination tube is moved in the x and y directions in a state where both flange portions are in contact with each other by the positioning means so that the x and y coordinate positions of the light emitting source coincide with those of the focal position. Is moved in the z-direction with the movement of the cylindrical collar through both flanges to make the z-coordinate position of the light emitting source coincide with that of the focal position, and both flanges are joined by laser welding, Heat the inorganic adhesive from the side to form a cylinder Characterized by fixing the error in the cylindrical portion of the reflector.

According to the first aspect of the present invention, since the flange of the cylindrical die is positioned in the x and y directions with respect to the flange of the cylindrical collar and then laser-welded, the x and y coordinates of the illumination light source are aligned. Since the fixing can be performed smoothly, and the cylindrical collar is slid in the z-direction with respect to the cylindrical portion of the reflector and positioned, the inorganic adhesive is heated and fixed from the side. , Y, and z directions can be positioned and fixed in a short time.

Further, according to the first invention of the present application, the amount of the inorganic pressure-sensitive adhesive used is extremely small, and the problem of contamination of the inner surface of the reflector due to the dripping of cement as in the conventional example does not occur.

In order to achieve the above object, a second aspect of the present invention is to provide a light source for an illumination tube having an axis in the z direction by moving the illumination tube in three-dimensional directions of x, y, and z by a positioning means. In the method of aligning the illumination light source for positioning the light source at the focal position of the reflector having the reflective spherical surface, the inorganic material deformed by pressurization is formed between the circular tube part of the illumination tube and the cylindrical part of the reflector inserted inside the illumination tube. The preform binder is interposed, and the illuminating tube is moved and positioned by moving the positioning means in the three-dimensional directions x, y, and z such that the x, y, and z coordinates of the light emitting source match those of the focal point. After that, the preform binder is heated from the side by laser irradiation, and the illumination tube is fixed to the reflector via the preform binder.

According to the second aspect of the present invention, the deformation of the preform binder interposed between the cylindrical portion of the reflector and the cylindrical portion of the illumination tube is utilized to obtain the x, y, and z coordinates of the illumination light source. Since the alignment is performed and the preform binder is heated and cured by laser irradiation to fix the illumination tube to the reflector, the positioning and fixing of the illumination light source can be performed in a short time.

Further, according to the second aspect of the present invention, since a binder having a predetermined shape (preformed binder) is used, there is a problem that the inside of the reflector is stained by the cement dripping as in the conventional example. Absent.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory view showing an alignment method of an illumination light source according to a first embodiment, and FIG. 2 is a perspective view of a cylindrical collar.

In the first embodiment, as shown in FIG. 1, a disk-shaped flange portion 7a is previously attached to a circular tube portion 12a of a glass illumination tube 12 provided with a light emitting source 3 in a central spherical bulging portion. Is fixed with an inorganic adhesive such as cement. And 0.5 m with respect to the outer periphery of this cylindrical base 7
A state in which a paste-like glass solder 9 is applied to a cylindrical portion 1b of a reflector 1 having a reflecting spherical surface 1a of an elliptical or hyperbolic spherical surface in advance with a cylindrical collar 8 having a flange portion 8a having a gap of about m to 2 mm. To be placed.

The cylindrical base 7 and the cylindrical collar 8
Is preferably made of a metal such as brass.

Next, by gripping the end of the illumination tube 12 provided with the light emitting source 3, the positioning means 20 which can move in the three-dimensional directions of x, y and z in FIG. , 8a while maintaining the contact state, the illumination tube 12 is moved in the direction of the contact surface, that is, in the x and y directions to perform centering alignment. At a position where the x, y coordinate position of the light emitting source 3 coincides with that of the focal position of the reflector 1, a pulse laser of several ms to several tens J is irradiated from the laser emission barrel 10 for several ms,
The metal contact portion, that is, the flange 8a of the cylindrical collar 8 and the flange 7a of the cylindrical base 7 are welded.

Next, the positioning means 20 is driven in the z-direction, and the illumination tube 12 is moved in and out of the cylindrical portion 1b of the reflector 1 so that the z-coordinate position of the light-emitting source 3 and thus the x-, y-, and z-coordinates. When the position is adjusted to match that of the focal point of the reflector 1, the glass solder 9 is heated by irradiating a laser from the laser emission column 11 to the side of the cylindrical collar 8. The laser conditions at this time are several J to several tens J and several tens Hz for a high repetition pulse.
It is preferable to inject energy of several J to several hundred J in a CW laser of up to several hundred Hz.

By this heating, the paste-like glass solder 9 is welded, and the cylindrical portion 1b of the reflector 1 and the cylindrical collar 8 are fixed. Instead of the glass solder 9, another inorganic adhesive such as ceramic solder or cement may be used.

Further, as shown in FIG.
By forming the notch 14 in the z-direction at the zigzag, even when the coefficient of thermal expansion between the cylindrical collar 8 and the reflector 1 is different, stress can be absorbed by the notch 14 and cracks in the glass solder 9 at the time of re-fixing after melting. Can be prevented. Therefore, ceramic glass having a low expansion coefficient can be used as a material of the reflector 1, and an illumination light source (lamp) having high-temperature heat resistance can be provided.

FIG. 3 is an explanatory view showing an alignment method of the illumination light source according to the second embodiment.

In the second embodiment, the illumination tube 12 is moved in the x, y, and z directions by the positioning means 20, so that the illumination tube 12 is focused on the reflector 1 having the reflective spherical surface 1a.
When the light source 3 is adjusted to be located, the illumination tube 1
A preformed flexible glass solder 13 is inserted between the cylindrical portion 12a of the second reflector 2 and the cylindrical portion 1b of the reflector 1, and the laser emitting lens barrel 11 is used from the side surface of the cylindrical portion 1b of the reflector 1. Welding is performed by laser irradiation.

The glass solder 13 is preferably formed in advance into a sponge-like shape having a cushioning property.

Alternatively, the glass solder 13 may be formed in a green sheet shape, wound around the circular tube portion 12a of the illumination tube 12, and inserted into the cylindrical portion 1b.

Further, the glass solder 13 may be dissolved in a paste which is soft when pressure is applied, and may be preformed.

Further, since the flexible glass solder 13 is used, when the x, y, and z coordinates of the light emitting source 3 are adjusted to those of the focal point, the illumination tube 1 having the glass solder 13 as a fulcrum is used.
It is obvious that it is possible to adopt an rθ coordinate system alignment that adjusts by adjusting the tilt angle (θ coordinate) of 2 and the amount of entrance / exit (r coordinate) of the illumination tube 12 with respect to the cylindrical portion 1b.

Instead of the preformed flexible glass solder 13, another inorganic preform binder such as ceramic solder or cement which can be deformed by pressure may be used.

[0027]

According to the present invention, it is possible to provide an illumination light source alignment method capable of quickly positioning a light source and fixing an illumination tube without soiling the inner surface of the reflector.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an alignment method of an illumination light source according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a notched cylindrical collar used in the first embodiment.

FIG. 3 is an explanatory diagram of an alignment method of an illumination light source according to a second embodiment.

FIG. 4 is an explanatory view of a conventional alignment method of an illumination light source.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reflector 1a Reflection spherical surface 1b Cylindrical part 3 Light emitting source 7 Cylindrical base 7a Flange part 8 Cylindrical collar 8a Flange part 9 Glass solder (inorganic adhesive) 10 Laser emission column 11 Laser emission column 12 Illumination tube 12a Circular tube Part 13 glass solder (preform binder) 14 cut 20 positioning means

Continuing from the front page (72) Inventor, Shin Zaku Imakubo 1-1, Yuukicho, Takatsuki-shi, Osaka, Japan Inside Matsushita Electronics Corporation (72) Inventor Toshiaki Ogura 1-1, Yukomachi, Takatsuki-shi, Osaka, Matsushita Electronics Corporation (72) Inventor Nobuyuki Ishida 1-1, Sachimachi, Takatsuki City, Osaka Prefecture Matsushita Electronics Corporation

Claims (7)

[Claims] An illumination tube is positioned by means of a positioning means,
In a method of aligning an illumination light source for moving a light source of an illumination tube at a focal position of a reflector having a reflective spherical surface by moving the illumination source in a three-dimensional direction of y and z, a circular tube portion of the illumination tube having an axis in az direction A cylindrical base having an outer end side with a flange portion on an x, y plane perpendicular to the z direction is fixed in a sleeved state, and has an inner diameter larger than the outer diameter of the cylindrical base; A cylindrical collar provided on the outer end side with a flange that comes into contact with the flange of the base in the x and y planes is held in a cylindrical state having an axial center in the z direction of the reflector via an inorganic adhesive. Then, the cylindrical base is loosely inserted into the cylindrical collar, and the positioning means moves the illumination tube in the x and y directions in a state where both the flanges are in contact with each other, so that the light source x,
While matching the y coordinate position to that of the focus position,
The illumination tube is moved in the z-direction with the movement of the cylindrical collar through both flanges so that the z-coordinate position of the light-emitting source matches that of the focal position, and both flanges are joined by laser welding. And heating the inorganic pressure-sensitive adhesive from the side to fix the cylindrical collar to the cylindrical portion of the reflector. 2. The method according to claim 1, wherein a notch in the z direction is formed in the cylindrical collar. 3. The method according to claim 1, wherein the inorganic adhesive is glass solder. 4. The method for aligning a light source for illumination according to claim 1, wherein the inorganic pressure-sensitive adhesive is heated from the side by laser irradiation to fix the cylindrical collar to the cylindrical portion of the reflector. . 5. An illumination tube according to claim 1, wherein said positioning means comprises:
A method of aligning an illumination light source for moving a light source of an illumination tube having an axis in the z direction at a focal position of a reflector having a reflective spherical surface by moving the illumination tube in a three-dimensional direction of y and z. An inorganic preform binder that is deformed by pressurization is interposed between the reflector and the cylindrical portion of the reflector that is loosely inserted inside, and the positioning means x,
The x, y, and z of the light source are moved by the three-dimensional movement of y and z.
After moving and positioning the illumination tube so that the coordinates coincide with those of the focal point, the preform binder is heated from the side by laser irradiation, and the illumination tube is fixed to the reflector via the preform binder. A method of aligning a light source for illumination. 6. The method according to claim 5, wherein the preform binder is glass solder or ceramic solder. 7. The preform binder is composed of a green sheet and is interposed between the cylindrical portion of the illumination tube and the cylindrical portion of the reflector in a state wound around the cylindrical portion of the illumination tube. An alignment method for an illumination light source according to claim 5.